[ 23.865711] BUG: Bad rss-counter state mm:0000000050b90697 type:MM_FILEPAGES val:33 [ 23.866826] BUG: Bad rss-counter state mm:0000000050b90697 type:MM_ANONPAGES val:22 [ 23.974492] ================================================================== [ 23.975195] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.975916] Read of size 8 at addr ffff88800967d3f8 by task sshd/220 [ 23.976498] [ 23.976668] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.977330] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.978073] Call Trace: [ 23.978317] [ 23.978534] dump_stack_lvl+0x91/0xf0 [ 23.978920] print_report+0xcc/0x620 [ 23.979489] ? __virt_addr_valid+0x102/0x340 [ 23.979851] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.980183] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.980515] kasan_report+0xbe/0xf0 [ 23.980774] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.981107] vma_interval_tree_remove+0xc75/0xec0 [ 23.981433] vma_prepare+0xc54/0x11a0 [ 23.981708] __split_vma+0x5af/0x950 [ 23.981963] ? __pfx___split_vma+0x10/0x10 [ 23.982253] ? find_held_lock+0x2c/0x110 [ 23.982539] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.982854] ? lock_is_held_type+0x9f/0x120 [ 23.983146] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.983466] ? mtree_range_walk+0x632/0x900 [ 23.983778] ? mas_walk+0x5c7/0x7c0 [ 23.984043] do_vmi_munmap+0x1f1/0x2b0 [ 23.984314] mmap_region+0x1f9/0x2660 [ 23.984581] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.984869] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.985274] ? __pfx_lock_acquire+0x10/0x10 [ 23.985575] ? __pfx_mmap_region+0x10/0x10 [ 23.985868] ? security_mmap_addr+0x7d/0xa0 [ 23.986165] ? get_unmapped_area+0x1f5/0x3f0 [ 23.986476] do_mmap+0x854/0xf00 [ 23.986732] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.987008] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.987324] ksys_mmap_pgoff+0x3af/0x500 [ 23.987607] do_syscall_64+0x3f/0x90 [ 23.987873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.988240] RIP: 0033:0x7f73fb41bd82 [ 23.988493] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 23.989674] RSP: 002b:00007ffcaec6cf08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.990186] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f73fb41bd82 [ 23.990676] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f73fa855000 [ 23.991155] RBP: 00007f73fa855000 R08: 0000000000000009 R09: 0000000000001000 [ 23.991626] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cd411aeb20 [ 23.992102] R13: 00007ffcaec6cf20 R14: 00007ffcaec6cf50 R15: 00007ffcaec6d2b0 [ 23.992579] [ 23.992745] [ 23.992867] Allocated by task 206: [ 23.993108] kasan_save_stack+0x22/0x50 [ 23.993392] kasan_set_track+0x25/0x30 [ 23.993668] __kasan_slab_alloc+0x59/0x70 [ 23.993958] kmem_cache_alloc+0x16b/0x370 [ 23.994251] vm_area_dup+0x20/0x160 [ 23.994499] __split_vma+0x170/0x950 [ 23.994757] split_vma+0xc6/0x110 [ 23.995003] mprotect_fixup+0x8d2/0xb30 [ 23.995279] do_mprotect_pkey+0x87e/0xd40 [ 23.995564] __x64_sys_mprotect+0x78/0xc0 [ 23.995852] do_syscall_64+0x3f/0x90 [ 23.996117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.996471] [ 23.996590] Freed by task 203: [ 23.996817] kasan_save_stack+0x22/0x50 [ 23.997092] kasan_set_track+0x25/0x30 [ 23.997363] kasan_save_free_info+0x2b/0x50 [ 23.997658] __kasan_slab_free+0x10a/0x190 [ 23.997951] kmem_cache_free+0x10d/0x4d0 [ 23.998232] rcu_core+0x8c8/0x2860 [ 23.998480] __do_softirq+0x1b7/0x7d4 [ 23.998762] [ 23.998881] Last potentially related work creation: [ 23.999214] kasan_save_stack+0x22/0x50 [ 23.999493] __kasan_record_aux_stack+0x8e/0xa0 [ 23.999807] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.000165] remove_vma+0x139/0x170 [ 24.000417] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.000724] do_vmi_munmap+0x1f1/0x2b0 [ 24.001000] __vm_munmap+0x138/0x3a0 [ 24.001255] __x64_sys_munmap+0x59/0x80 [ 24.001538] do_syscall_64+0x3f/0x90 [ 24.001806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.002162] [ 24.002281] The buggy address belongs to the object at ffff88800967d3a0 [ 24.002281] which belongs to the cache vm_area_struct of size 168 [ 24.003104] The buggy address is located 88 bytes inside of [ 24.003104] freed 168-byte region [ffff88800967d3a0, ffff88800967d448) [ 24.003879] [ 24.004000] The buggy address belongs to the physical page: [ 24.004369] page:00000000531d3a74 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x967d [ 24.004973] memcg:ffff888012efbe01 [ 24.005210] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.005603] page_type: 0xffffffff() [ 24.005850] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 24.006363] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888012efbe01 [ 24.006877] page dumped because: kasan: bad access detected [ 24.007246] [ 24.007369] Memory state around the buggy address: [ 24.007690] ffff88800967d280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 24.008166] ffff88800967d300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 24.008643] >ffff88800967d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.009121] ^ [ 24.009592] ffff88800967d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.010063] ffff88800967d480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.010537] ================================================================== [ 24.011094] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.083493] BUG: Bad rss-counter state mm:000000004e4cfefa type:MM_FILEPAGES val:33 [ 26.084503] BUG: Bad rss-counter state mm:000000004e4cfefa type:MM_ANONPAGES val:22 [ 26.558839] BUG: Bad rss-counter state mm:00000000b5e23913 type:MM_FILEPAGES val:33 [ 26.559934] BUG: Bad rss-counter state mm:00000000b5e23913 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24199' (ECDSA) to the list of known hosts. 2023/06/21 05:19:06 fuzzer started 2023/06/21 05:19:06 dialing manager at localhost:36067 2023/06/21 05:19:06 checking machine... 2023/06/21 05:19:06 checking revisions... [ 27.213693] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:19:06 testing simple program... [ 27.247070] cgroup: Unknown subsys name 'net' [ 27.289678] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:19:05 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fc9fa2f0930 CR3=000000000c66e000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=b01389c3651ee091014ac3f0d9707d82 XMM02=000000000011ac30eff9b2d0a8fce9cb XMM03=000000000011ad002c67c8bc2e329bc3 XMM04=54b2322abddc39e900000000000ae988 XMM05=19e9129bd510f23500000000001319f0 XMM06=c8fffa86e0ed6ae00000000000130bc8 XMM07=e042d86d42eb936e0000000000122138 XMM08=fbab350eb8c2edea000000000011ad00 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000255 RCX=0000000000000000 RDX=ffff88800f088000 RSI=ffffffff8171b153 RDI=ffff88800f0884a8 RBP=ffff888015a822b8 RSP=ffff888017b17e70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800f088000 R13=00007f0100fae968 R14=ffff888015a822c8 R15=0000000000000000 RIP=ffffffff814c0880 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f010040c900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f0100fae968 CR3=00000000142be000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000